crappy windows when opening using intel driver and compiz

[alxgomz]

Since I switched to intrepid, I have display problem. This is a non blocking problem but is very anoying, and does not look like somthing good to people looking at ubuntu for the first time.
When I open a window in X, it first display very crapp before displaying correctly. I attached a sceenshot of what i call a crappy display wihle opening firefox (but it may happen with other windows, even with gdm sometimes).

According to Xorg.0.log, xorg uses intel X driver, chipset is 965GM, acceleration method is EXA.
when compiz disabled and replaced by metacity, the problem no longer appear. When using XAA instead of EXA and compiz, i get a window filled with black instead of the crapy stuff i got when using EXA...

This sounds to me a intel xorg driver related problem, but i may be wrong.